Microsoft.Windows.Controls.Ribbon.RibbonMenuButton.OnDismissPopup C# (CSharp) Method

        protected virtual void OnDismissPopup(RibbonDismissPopupEventArgs e)
        {
            UIElement popupChild = _popup.TryGetChild();
            RibbonHelper.HandleDismissPopup(e,
                delegate(bool value) { IsDropDownOpen = value; },
                delegate(DependencyObject d) { return d == _partToggleButton; },
                popupChild,
                this);
        }